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SUMMARY:Estimating Quantum Gravity Corrections Near Black Holes [Confirmed
]
DTSTART:20241010T183000Z
DTEND:20241010T200000Z
DTSTAMP:20241111T031900Z
UID:indico-event-685@events.perimeterinstitute.ca
DESCRIPTION:Speakers: Ben Freivogel (University of Amsterdam - Institute f
or Theoretical Physics (ITFA))\n\nWe analyze the size of quantum gravity e
ffects near black hole horizons. By considering black holes in asymptotica
lly AdS spacetime\, we can make use of the "quantum deviation" to estimate
the size of quantum gravity corrections to the semiclassical analysis. We
find that\, in a typical pure state\, corrections to correlation function
s are typically of order exp(-S/2). Both the magnitude and time dependence
of the correlator differ from previous results related to the spectral fo
rm factor\, which estimated the correlator in a thermal state. Our results
severely constrain proposals\, such as non-violent unitarization and some
versions of fuzzballs\, that predict significant corrections to the semic
lassical computation of correlation functions near black holes. We point o
ut one possible loophole: our results rely on the standard result that bul
k reconstruction is state independent for small perturbations outside the
black hole.\n\nhttps://events.perimeterinstitute.ca/event/685/
LOCATION:PI/4-405 - Bob Room (Perimeter Institute for Theoretical Physics)
URL:https://events.perimeterinstitute.ca/event/685/
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